Eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
agnathan \agnathan\ n. 1. an eel-shaped vertebrate without jaws or paired appendages; a member of the Agnatha. The group includes the cyclostomes and some extinct forms. Syn: jawless vertebrate, jawless fish

Wiktionary Word definitions in Wiktionary
a. (context zoology English) Belonging or pertaining to the superclass Agnatha, the jawless vertebrates. n. (context zoology English) A member of the superclass Agnatha of jawless vertebrates.

WordNet Word definitions in WordNet
n. eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms [syn: jawless vertebrate , jawless fish ]